harder? is that so? you used to say i'm pulling harder because you see the rope moving this way. that's what you used to say. remember the old days, when you didn't have that spark called what, begin with a f. - physics. - physics, all right? and now you're getting that spark, right? and now you're starting to see the world a little differently. let's try this with a couple of scale. attach this right on here. okay, now you pull that side and we can measure the force, gang, yeah? and i'll pull over here. now you look to see who pulls harder, me on helen or helen on me? and here we go. how do the readings look, gang? huh? which one is harder? how about there? how about there? and what are they, gang? ss, same same. i can't pull on you any harder than you pull on me, okay? and when i touch you-- who's touching you? am i touching her or she touching me? she's touching my hand, i felt it. from my point of view she's touching me. from her point of view i'm touching her. who's touching who? we're touching each other. thank you, helen. my thumb, my forefinger, they're pulling on each other.